How to make driving out demons reasonable for non-christians@2pietjuh2: I think it can be answered simply, in that the way it is written may no convey HOW he is thinking this may have happened. What you can explain to him is that someone was sick (mental/physical) and that Jesus was able to heal that person via spiritual means. In other words, Jesus could heal beyond means that we are aware of. That should be the take away.